Ardl

ardl.ino

#include <EEPROM.h>
#include "base64.hpp"

void help() {
  Serial.println(F("Ardl Helpfile\n"
                   "\n"
                   "System Limitations:\n"
                   "Maximum Input Length: 255 characters\n"
                   "CPU Speed: 8Mhz\n"
                   "\n"
                   "System Commands:\n"
                   "echo ...var\tEchoes an input back to the console.\n"
                   "clear\tClears the console by printing 1000 newlines.\n"
                   "b64 ..msg\tEncode a string to base64.\n"
                   "-b64 ..msg\tDecode a base64 string.\n"
                   "?\tShows this message.\n"));
}

void setup() {
  Serial.begin(9600);
  Serial.println("Welcome to Ardl!");
  help();
}

char command[255];
int com_pos = 0;

void b64() {
  unsigned char b64[strlen(String(command).substring(4).c_str()) - 1];
  for (int i = 0; i < strlen(String(command).substring(4).c_str() - 1); i++) {
    b64[i] = 0;
  }
  encode_base64(String(command).substring(4).c_str(), strlen(String(command).substring(4).c_str()), b64);
  Serial.println((char*)b64);
}

void ub64() {
  char str[251];
  for (int i = 0; i < 251; i++) {
    str[i] = 0;
  }
  decode_base64(String(command).substring(5).c_str(), str);
  Serial.println(str);
}

void eval() {
  if (command[0] == '?') {
    help();
  } else if (strncmp(command, "echo", 4) == 0) {
    Serial.println(String(command).substring(5).c_str());
  } else if (strncmp(command, "clear", 5) == 0) {
    for (int i = 0; i < 1000; i++) {
      Serial.write('\n');
    }
  } else if (strncmp(command, "b64", 3) == 0) {
    b64();
  } else if (strncmp(command, "-b64", 4) == 0) {
    ub64();
  } else {
    Serial.print("Error, command not understood: ");
    Serial.println(command);
  }
}

void loop() {
  if (Serial.available() > 0) {
    int data = Serial.read();
    if (data != 10) {
      command[com_pos] = data;
      if (com_pos < 254) {
        com_pos += 1;
      }
    } else {
      eval();
      for (int i = 0; i < 255; i++) {
        command[i] = 0;
      }
      com_pos = 0;
    }
  }
}